EP0561682A1 - Security apparatus for workers working at high places - Google Patents

Security apparatus for workers working at high places Download PDF

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Publication number
EP0561682A1
EP0561682A1 EP19930400650 EP93400650A EP0561682A1 EP 0561682 A1 EP0561682 A1 EP 0561682A1 EP 19930400650 EP19930400650 EP 19930400650 EP 93400650 A EP93400650 A EP 93400650A EP 0561682 A1 EP0561682 A1 EP 0561682A1
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EP
European Patent Office
Prior art keywords
axis
rope
cheeks
toothed wheel
safety
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP19930400650
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German (de)
French (fr)
Inventor
Pierre-Georges Pelofi
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Komet
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Komet
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Publication date
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Publication of EP0561682A1 publication Critical patent/EP0561682A1/en
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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B1/00—Devices for lowering persons from buildings or the like
    • A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
    • A62B1/14—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brakes sliding on the rope
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
    • A62B35/04—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion incorporating energy absorbing means

Definitions

  • the invention relates to improvements to safety devices for workers working in high places.
  • the invention relates to devices which are movable along a safety rope stretched vertically against the wall of a building, a tower or a pylon.
  • Such devices include a body provided with a channel through which the safety rope passes, a brake cooperating with the rope and a ring connected by a link to a belt or to a harness worn by the worker, said ring being combined with a system to block the device on the rope, if the worker falls.
  • the ring is connected to a cam which jams the safety rope against the bottom of the channel if the tension on the ring exceeds a determined value.
  • One of the aims of the present invention is in particular to remedy these drawbacks.
  • the device according to the invention is of the type comprising a body comprising two cheeks delimiting a channel intended to be crossed by a safety rope extending vertically along a building, a ring intended to be connected by a link to a belt or a harness worn by a worker, a brake cooperating with the safety rope in order to prevent the device from tending to slide along said rope and means for locking the device on the rope if the worker falls , said device being characterized in that the cheeks are connected by a transverse axis on which is frictionally mounted a toothed wheel cooperating with the safety rope for constitute the brake, on the axis being mounted a cam having a toothing capable of cooperating with the safety rope and biased in a position away from said rope by a spring, on the axis being mounted a counterweight cooperating with a pawl, maintained separated from a toothed wheel secured to the cam by a spring, the counterweight being mounted so that if the toothed wheel rotates at a speed greater than a determined threshold,
  • the device comprises two cams each provided with a toothed crown, two weights arranged on either side of the toothed crown and two pawls intended to cooperate with a corresponding toothed crown, these having oriented teeth in opposite directions, the pawls also being oriented in opposite directions and the ring being movable in a slot in the cheeks so as to be able to be selectively disposed in the vicinity of one or the other end of the device.
  • the device can be placed in two positions offset by 180 °, which facilitates mounting.
  • the cam comprises a sector-shaped slot having as its center the axis of the device and in which fingers are movable with which the ends of a torsion spring wound on the axis cooperate and tend to maintain the fingers against the corresponding ends of the slot.
  • the toothed wheel is integral with an axis projecting on its two faces and on which the pawls are hinged, the springs holding the pawls apart from the toothed crowns are carried by studs integral with the toothed wheel and which constitute stops for the flyweights.
  • the toothed wheel is wedged on a ring mounted to rotate on the axis and on which the weights are mounted.
  • the cheeks are secured to a hinge and the axis is secured to one of the cheeks and is hollow and tapped to receive a threaded rod for assembling the two cheeks together. Thanks to this arrangement, the installation of the device on the safety rope is very easy.
  • Figure 1 is an elevational view of a device according to the invention.
  • Figure 2 is a plan view of the device of Figure 1.
  • Figure 3 is a sectional view along line 3-3 of Figure 2.
  • Figure 4 is a sectional view along line 4-4 of Figure 2.
  • Figure 5 is a sectional view on a larger scale corresponding to Figure 4 of a detail.
  • Figure 6 is a sectional view along line 6-6 of Figure 4.
  • Figure 7 is a sectional view along line 7-7 of Figure 4.
  • Figure 8 is an exploded perspective view of the locking system.
  • Figure 9 and Figure 10 are sectional views corresponding to Figure 7 and showing the different phases of operation.
  • the device shown in the figures consists of a body 1 formed of two cheeks 2 and 3 articulated on a hinge 4, said cheeks delimiting a channel which is crossed by a safety rope 6.
  • the cheeks support two axes 7 on which rollers turn 8 pressing the rope 6 against the bottom of the channel 5.
  • the cheeks On the side opposite the channel, the cheeks have a sector-shaped slit 10 in which a stud 11 is guided secured to a ring 12.
  • the cheek 3 comprises, mounted rotating a nut 12 into which a first part 13 of a threaded rod is screwed extended by a second threaded part 14 having a smaller diameter and onto which is screwed a nut 15 bearing against the cheek 2.
  • the nut 15 and the threaded rod 14 are pierced with a diametrical hole for the engagement of a safety pin 16.
  • the nut 12 comprises a housing 17 in which engages the end of a sleeve 18 having a thread 19 into which the first part 13 of the threaded rod is screwed.
  • the sleeve 18 has a shoulder 20 bearing against the cheek 2 and being housed in a groove 22 in the corresponding face of the nut 15.
  • the sleeve 18 constitutes an axis on which is frictionally mounted a ring 25 on which a toothed wheel 26 is wedged cooperating with the safety rope 6 and constituting a brake so that the device does not tend to slide along said rope by gravity.
  • flyweight 27 On the ring 25, on either side of the toothed wheel 26 are frictionally mounted two flyweights 27 and 28.
  • the flyweight 27 has a flat 30 against which carries a pawl 31 articulated on an axis 33 integral with the toothed wheel 26 and projecting from the corresponding face, said pawl being held against said flat by a spring 32.
  • the counterweight 28 has a flat 34 against which is applied by the action of a spring 36 a pawl 35 articulated on the axis 33 which projects from the other face of the toothed wheel 36.
  • the springs 32 and 36 are held by pins 37 integral with the toothed wheel 26.
  • a blocking device assembly designated as a whole by the reference 40.
  • This assembly 40 comprises two cams 41 and 42.
  • the cam 41 has, on the side facing the channel 5, a smooth part 41 a and symmetrically with respect to a horizontal plane passing through the threaded rod 13 of the teeth 41 b and 41 c , while the part opposite the smooth part 41 is pierced with a sector-shaped slot 45.
  • a part 60 which has a circular opening in which is formed a toothing 56 and forming a toothed crown.
  • the cam 42 is produced in the same way as the cam 41 and has a smooth part 42 a , teeth 42 b and 42 c and a slot 46.
  • a part 62 which is pierced with a circular opening in the edge of which is formed a toothing 55 forming a toothed crown.
  • a spacer 57 having a circular notch 63 opposite which the toothed wheel moves 26.
  • the pieces 60, 62 and 67 have slots respectively 64, 65 and 66 which are aligned with the slots 45 and 46.
  • the parts 60 and 62 have the shape of cams corresponding to the cams 41 and 42.
  • the cams 41 and 42 and the parts 60, 62 and 57 are assembled by rivets 69 passing through corresponding holes of the said parts.
  • the cheeks 2 and 3 each have a slot 50, these coinciding with the slots 45 and 46.
  • toothed rings 55 and 56 have their teeth oriented in opposite directions and that the pawls 31 and 35 are also arranged in opposite directions.
  • the flyweights can only pivot in one direction of rotation since in the other direction the flat lands on the nipple 37.
  • the worker working at a high place wears a belt or a harness from which extends a link which is, at its free end, provided with a safety hook fixed to the ring 12.
  • the toothed wheel 26 cooperates with the safety rope 6 and constitutes a brake preventing the device from sliding freely along said rope 6.
  • the device moves effortlessly along the safety rope 6, the wheel 26 rotating by cooperating with its teeth with said rope.
  • the gear 26 moves at a low speed, the weights 27 and 28 are driven in the direction of rotation of the gear 26.
  • the device moves along the safety rope in the direction of arrow f, the toothed wheel 26 is driven at a high speed so that the counterweight 27, against the action of the spring 32, will rotate the pawl 31 which will then engage in a tooth of the crown 55 so that the cams 41 and 42 are driven in the direction of the arrow g against the action of the branch 71 of the spring 70 since the finger 51 abuts against the corresponding end of the slot 46, the teeth 42 c then come to be embedded in the safety rope 6 thus blocking the assembly (see FIG. 10).
  • the process is identical but in this case it is the pawl 35 which, by cooperating with the crown 56, controls the locking, the stud 11 sliding to come to the other end of the sector 10 so that the ring 12 is directed downwards.
  • the device is very easy to install on the safety rope 6 since it suffices to remove the threaded rod 13 in order to be able to move the cheeks 2 and 3 apart from one another by tilting them on the hinge 4.
  • the device Since the device works in both directions, it can be mounted on the safety rope 6 without any special precautions.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Lowering Means (AREA)

Abstract

Safety device comprising a body delimiting a passage (5) traversed by a safety line (6), a ring (12) connected by a link to a belt, a brake (26) and means for blocking the device on the line in the event of a fall, characterised in that it includes a transverse spindle (18) on which is frictionally mounted a toothed wheel (26) constituting the brake, there being mounted on the spindle (18) a cam (41, 42) having teeth (41c, 42c) capable of interacting with the safety line (6) and a flyweight (27, 28) interacting with a pawl (31, 35) held away from an internally toothed ring (55, 56) secured to the cam (41, 42) by a spring, the flyweight (27, 28) being mounted so that if the toothed wheel (28) rotates at a speed which is greater than a given threshold it causes the pawl to engage in the internally toothed ring (55, 56) so that the cam, by means of its teeth, wedges the line in the bottom of the passage (5). <IMAGE>

Description

L'invention concerne des perfectionnements aux dispositifs de sécurité pour ouvriers travaillant dans des endroits élevés.The invention relates to improvements to safety devices for workers working in high places.

L'invention vise des dispositifs qui sont mobiles le long d'une corde de sécurité tendue verticalement contre la paroi d'un édifice, d'une tour ou d'un pylone.The invention relates to devices which are movable along a safety rope stretched vertically against the wall of a building, a tower or a pylon.

De tels dispositifs comprennent un corps pourvu d'un canal dans lequel passe la corde de sécurité, un frein coopérant avec la corde et un anneau relié par un lien à une ceinture ou à un harnais porté par l'ouvrier, ledit anneau étant combiné avec un système destiné à bloquer le dispositif sur la corde, si l'ouvrier vient à chuter.Such devices include a body provided with a channel through which the safety rope passes, a brake cooperating with the rope and a ring connected by a link to a belt or to a harness worn by the worker, said ring being combined with a system to block the device on the rope, if the worker falls.

Généralement, l'anneau est relié à une came qui vient coincer la corde de sécurité contre le fond du canal si la tension sur l'anneau dépasse une valeur déterminée.Generally, the ring is connected to a cam which jams the safety rope against the bottom of the channel if the tension on the ring exceeds a determined value.

De tels dispositifs sont très connus et fonctionnent parfaitement. Ils présentent toutefois quelques inconvénients. Ils doivent être montés sur la corde de sécurité dans une position déterminée car ils ne fonctionnent que dans un seul sens. Lorsque l'ouvrier chute le blocage est instantané ce qui risque d'entraîner des lésions.Such devices are very well known and work perfectly. However, they have some drawbacks. They must be mounted on the safety rope in a determined position because they only work in one direction. When the worker falls, the blockage is instantaneous, which risks causing injuries.

L'un des buts de la présente invention est notamment de rémédier à ces inconvénients.One of the aims of the present invention is in particular to remedy these drawbacks.

Le dispositif, selon l'invention, est du type comprenant un corps comportant deux joues délimitant un canal destiné à être traversé par une corde de sécurité s'étendant verticalement le long d'un édifice, un anneau destiné à être relié par un lien à une ceinture ou un harnais porté par un ouvrier, un frein coopérant avec la corde de sécurité afin d'éviter que le dispositif tende à glisser le long de ladite corde et des moyens pour bloquer le dispositif sur la corde si l'ouvrier vient à chuter, ledit dispositif étant caractérisé en ce que les joues sont reliées par un axe transversal sur lequel est montée à friction une roue dentée coopérant avec la corde de sécurité pour constituer le frein, sur l'axe étant montée une came présentant une denture susceptible de coopérer avec la corde de sécurité et sollicitée dans une position écartée de ladite corde par un ressort, sur l'axe étant montée une masselotte coopérant avec un cliquet, maintenue écartée d'une roue dentée solidaire de la came par un ressort, la masselotte étant montée de manière que si la roue dentée tourne à une vitesse supérieure à un seuil déterminé elle commande l'engagement du cliquet dans la couronne dentée afin que la came soit entraînée et vienne par sa denture coincer la corde de sécurité dans le fond du canal.The device according to the invention is of the type comprising a body comprising two cheeks delimiting a channel intended to be crossed by a safety rope extending vertically along a building, a ring intended to be connected by a link to a belt or a harness worn by a worker, a brake cooperating with the safety rope in order to prevent the device from tending to slide along said rope and means for locking the device on the rope if the worker falls , said device being characterized in that the cheeks are connected by a transverse axis on which is frictionally mounted a toothed wheel cooperating with the safety rope for constitute the brake, on the axis being mounted a cam having a toothing capable of cooperating with the safety rope and biased in a position away from said rope by a spring, on the axis being mounted a counterweight cooperating with a pawl, maintained separated from a toothed wheel secured to the cam by a spring, the counterweight being mounted so that if the toothed wheel rotates at a speed greater than a determined threshold, it controls the engagement of the pawl in the toothed ring so that the cam is entrained and comes by its teeth wedging the safety rope in the bottom of the channel.

Grâce à une telle disposition, on réalise un dispositif d'une conception simple qui présente une grande sureté de fonctionnement et constitue un parachute progressif.Thanks to such an arrangement, a device of a simple design is produced which has great operational safety and constitutes a progressive parachute.

Suivant une autre caractéristique, le dispositif comporte deux cames pourvues chacune d'une couronne dentée, deux masselottes disposées de part et d'autre de la couronne dentée et deux cliquets destinés à coopérer avec une couronne dentée correspondante, celles-ci ayant des dentures orientées en sens opposés, les cliquets étant également orientés en sens opposés et l'anneau étant mobile dans une fente des joues de manière à pouvoir être disposé sélectivement au voisinage de l'une ou l'autre extrémité du dispositif.According to another characteristic, the device comprises two cams each provided with a toothed crown, two weights arranged on either side of the toothed crown and two pawls intended to cooperate with a corresponding toothed crown, these having oriented teeth in opposite directions, the pawls also being oriented in opposite directions and the ring being movable in a slot in the cheeks so as to be able to be selectively disposed in the vicinity of one or the other end of the device.

Grâce à cette disposition, le dispositif peut être disposé dans deux positions décalées de 180°, ce qui facilite le montage.Thanks to this arrangement, the device can be placed in two positions offset by 180 °, which facilitates mounting.

Suivant une caractéristique constructive, la came comporte une fente en forme de secteur ayant pour centre l'axe du dispositif et dans laquelle sont mobiles des doigts avec lesquels coopèrent les extrémités d'un ressort de torsion enroulé sur l'axe et tendant à maintenir les doigts contre les extrémités correspondantes de la fente.According to a constructive characteristic, the cam comprises a sector-shaped slot having as its center the axis of the device and in which fingers are movable with which the ends of a torsion spring wound on the axis cooperate and tend to maintain the fingers against the corresponding ends of the slot.

Suivant encore une caractéristique constructive, la roue dentée est solidaire d'un axe faisant saillie sur ses deux faces et sur lequel sont montés articulés les cliquets, les ressorts maintenant les cliquets écartés des couronnes dentées sont portés par des tétons solidaires de la roue dentée et qui constituent des butées pour les masselottes.According to another constructive characteristic, the toothed wheel is integral with an axis projecting on its two faces and on which the pawls are hinged, the springs holding the pawls apart from the toothed crowns are carried by studs integral with the toothed wheel and which constitute stops for the flyweights.

Suivant une autre caractéristique constructive, la roue dentée est calée sur une bague montée tournante sur l'axe et sur laquelle sont montées les masselottes.According to another constructive characteristic, the toothed wheel is wedged on a ring mounted to rotate on the axis and on which the weights are mounted.

Enfin, les joues sont solidaires d'une charnière et l'axe est solidaire de l'une des joues et est creux et taraudé pour recevoir une tige filetée d'assemblage des deux joues entre elles. Grâce à cette disposition, la mise en place du dispositif sur la corde de sécurité est très aisée.Finally, the cheeks are secured to a hinge and the axis is secured to one of the cheeks and is hollow and tapped to receive a threaded rod for assembling the two cheeks together. Thanks to this arrangement, the installation of the device on the safety rope is very easy.

L'invention va maintenant être décrite avec plus de détails en se référant à un mode de réalisation particulier donné à titre d'exemple seulement et représenté aux dessins annexés, dans lesquels :The invention will now be described in more detail with reference to a particular embodiment given by way of example only and shown in the accompanying drawings, in which:

Figure 1 est une vue en élévation d'un dispositil, selon l'invention.Figure 1 is an elevational view of a device according to the invention.

Figure 2 est une vue en plan du dispositif de la figure 1.Figure 2 is a plan view of the device of Figure 1.

Figure 3 est une vue en coupe suivant la ligne 3-3 de la figure 2.Figure 3 is a sectional view along line 3-3 of Figure 2.

Figure 4 est une vue en coupe suivant la ligne 4-4 de la figure 2.Figure 4 is a sectional view along line 4-4 of Figure 2.

Figure 5 est une vue en coupe à plus grande échelle correspondant à la figure 4 d'un détail.Figure 5 is a sectional view on a larger scale corresponding to Figure 4 of a detail.

Figure 6 est une vue en coupe suivant la ligne 6-6 de la figure 4.Figure 6 is a sectional view along line 6-6 of Figure 4.

Figure 7 est une vue en coupe suivant la ligne 7-7 de la figure 4.Figure 7 is a sectional view along line 7-7 of Figure 4.

Figure 8 est une vue en perspective éclatée du système de blocage.Figure 8 is an exploded perspective view of the locking system.

Figure 9 et figure 10 sont des vues en coupe correspondant à la figure 7 et montrant les différentes phases du fonctionnement.Figure 9 and Figure 10 are sectional views corresponding to Figure 7 and showing the different phases of operation.

Le dispositif représenté aux figures est constitué d'un corps 1 formé de deux joues 2 et 3 articulées sur une charnière 4, lesdites joues délimitant un canal qui est traversé par une corde de sécurité 6.The device shown in the figures consists of a body 1 formed of two cheeks 2 and 3 articulated on a hinge 4, said cheeks delimiting a channel which is crossed by a safety rope 6.

Les joues supportent deux axes 7 sur lesquels tournent des galets 8 pressant la corde 6 contre le fond du canal 5.The cheeks support two axes 7 on which rollers turn 8 pressing the rope 6 against the bottom of the channel 5.

Du côté opposé au canal les joues comportent une fente en forme de secteur 10 dans lequel est guidé un téton 11 solidaire d'un anneau 12.On the side opposite the channel, the cheeks have a sector-shaped slit 10 in which a stud 11 is guided secured to a ring 12.

La joue 3 comporte, monté tournant un écrou 12 dans lequel se visse une première partie 13 d'une tige filetée prolongée par une seconde partie filetée 14 présentant un plus petit diamètre et sur laquelle se visse un écrou 15 portant contre la joue 2. L'écrou 15 et la tige filetée 14 sont percés d'un trou diamétral pour l'engagement d'une goupille de sécurité 16.The cheek 3 comprises, mounted rotating a nut 12 into which a first part 13 of a threaded rod is screwed extended by a second threaded part 14 having a smaller diameter and onto which is screwed a nut 15 bearing against the cheek 2. The nut 15 and the threaded rod 14 are pierced with a diametrical hole for the engagement of a safety pin 16.

L'écrou 12 comporte un logement 17 dans lequel s'engage l'extrémité d'un manchon 18 présentant un taraudage 19 dans lequel se visse la première partie 13 de la tige filetée. A son extrémité libre, le manchon 18 comporte un épaulement 20 portant contre la joue 2 et se logeant dans une gorge 22 de la face correspondante de l'écrou 15.The nut 12 comprises a housing 17 in which engages the end of a sleeve 18 having a thread 19 into which the first part 13 of the threaded rod is screwed. At its free end, the sleeve 18 has a shoulder 20 bearing against the cheek 2 and being housed in a groove 22 in the corresponding face of the nut 15.

Le manchon 18 constitue un axe sur lequel est montée à friction une bague 25 sur laquelle est calée une roue dentée 26 coopérant avec la corde de sécurité 6 et constituant un frein de manière que le dispositif ne tende pas à glisser le long de ladite corde par gravité.The sleeve 18 constitutes an axis on which is frictionally mounted a ring 25 on which a toothed wheel 26 is wedged cooperating with the safety rope 6 and constituting a brake so that the device does not tend to slide along said rope by gravity.

Sur la bague 25, de part et d'autre de la roue dentée 26 sont montées à frottement deux masselottes 27 et 28. La masselotte 27 comporte un méplat 30 contre lequel porte un cliquet 31 articulé sur un axe 33 solidaire de la roue dentée 26 et en saillie sur la face correspondante, ledit cliquet étant maintenu contre ledit méplat par un ressort 32.On the ring 25, on either side of the toothed wheel 26 are frictionally mounted two flyweights 27 and 28. The flyweight 27 has a flat 30 against which carries a pawl 31 articulated on an axis 33 integral with the toothed wheel 26 and projecting from the corresponding face, said pawl being held against said flat by a spring 32.

La masselotte 28 présente un méplat 34 contre lequel est appliqué par l'action d'un ressort 36 un cliquet 35 articulé sur l'axe 33 qui fait saillie sur l'autre face de la roue dentée 36. Les ressorts 32 et 36 sont maintenus par des tétons 37 solidaires de la roue dentée 26.The counterweight 28 has a flat 34 against which is applied by the action of a spring 36 a pawl 35 articulated on the axis 33 which projects from the other face of the toothed wheel 36. The springs 32 and 36 are held by pins 37 integral with the toothed wheel 26.

Sur le manchon 18 est monté un ensemble de blocage du dispositif désigné dans son ensemble par la référence 40.On the sleeve 18 is mounted a blocking device assembly designated as a whole by the reference 40.

Cet ensemble 40 comprend deux cames 41 et 42. La came 41 présente, du côté tourné vers le canal 5, une partie lisse 41a et symétriquement par rapport à un plan horizontal passant par la tige filetée 13 des dents 41b et 41c, tandis que la partie opposée à la partie lisse 41 est percée d'une fente 45 en forme de secteur. Contre la face de la came 41 tournée vers la roue dentée 26 est fixée une pièce 60 qui comporte une ouverture circulaire dans laquelle est pratiquée une denture 56 et formant une couronne dentée. La came 42 est réalisée de la même façon que la came 41 et comporte une partie lisse 42a, des dentures 42b et 42c et une fente 46. Contre la face de la came 42, tournée du côté de la roue dentée 26, est fixée une pièce 62 qui est percée d'une ouverture circulaire dans le bord de laquelle est pratiquée une denture 55 formant une couronne dentée. Entre les pièces 60 et 62 est insérée une entretoise 57 présentant une échancrure circulaire 63 en regard de laquelle se meut la roue dentée 26. Les pièces 60, 62 et 67 comportent des fentes respectivement 64, 65 et 66 qui sont alignées avec les fentes 45 et 46. Les pièces 60 et 62 affectent la forme de cames correspondant aux cames 41 et 42. Les cames 41 et 42 et les pièces 60, 62 et 57 sont assemblées par des rivets 69 traversant des trous correspondant desdites pièces.This assembly 40 comprises two cams 41 and 42. The cam 41 has, on the side facing the channel 5, a smooth part 41 a and symmetrically with respect to a horizontal plane passing through the threaded rod 13 of the teeth 41 b and 41 c , while the part opposite the smooth part 41 is pierced with a sector-shaped slot 45. Against the face of the cam 41 facing the toothed wheel 26 is fixed a part 60 which has a circular opening in which is formed a toothing 56 and forming a toothed crown. The cam 42 is produced in the same way as the cam 41 and has a smooth part 42 a , teeth 42 b and 42 c and a slot 46. Against the face of the cam 42, turned towards the side of the toothed wheel 26, is fixed a part 62 which is pierced with a circular opening in the edge of which is formed a toothing 55 forming a toothed crown. Between the pieces 60 and 62 is inserted a spacer 57 having a circular notch 63 opposite which the toothed wheel moves 26. The pieces 60, 62 and 67 have slots respectively 64, 65 and 66 which are aligned with the slots 45 and 46. The parts 60 and 62 have the shape of cams corresponding to the cams 41 and 42. The cams 41 and 42 and the parts 60, 62 and 57 are assembled by rivets 69 passing through corresponding holes of the said parts.

Les joues 2 et 3 comportent chacune une fente 50, celles-ci coïncidant avec les fentes 45 et 46.The cheeks 2 and 3 each have a slot 50, these coinciding with the slots 45 and 46.

Dans les différentes fentes 45, 46, 50, 64, 65 et 66 sont engagés des doigts 51 et 52, le doigt 51 étant poussé, par une extrémité 71 correspondant d'un ressort de torsion 70 enroulé sur le manchon 18, contre l'une des extrémités desdites fentes, l'autre extrémité 72 dudit ressort 70 tendant à pousser le téton 52 contre l'autre extrémité des fentes 45, 46, 50, 64, 65 et 66.In the various slots 45, 46, 50, 64, 65 and 66 are engaged fingers 51 and 52, the finger 51 being pushed, by a corresponding end 71 of a torsion spring 70 wound on the sleeve 18, against the one of the ends of said slots, the other end 72 of said spring 70 tending to push the stud 52 against the other end of the slots 45, 46, 50, 64, 65 and 66.

On conçoit que grâce à ce montage les cames 41 et 42 sont maintenues en équilibre, les parties lisses 41a et 42a s'étendant en regard du canal 5.It can be seen that, thanks to this arrangement, the cams 41 and 42 are kept in equilibrium, the smooth parts 41 a and 42 a extending opposite the channel 5.

On remarquera que les couronnes dentées 55 et 56 ont leurs dents orientées dans des sens opposés et que les cliquets 31 et 35 sont également disposés en sens contraire.It will be noted that the toothed rings 55 and 56 have their teeth oriented in opposite directions and that the pawls 31 and 35 are also arranged in opposite directions.

Les masselottes peuvent pivoter seulement dans un sens de rotation puisque dans l'autre sens le méplat bute sur le téton 37.The flyweights can only pivot in one direction of rotation since in the other direction the flat lands on the nipple 37.

Le fonctionnement du dispositif est le suivant:The operation of the device is as follows:

L'ouvrier travaillant à un endroit élevé porte une ceinture ou un harnais à partir duquel s'étend un lien qui est, à son extrémité libre, pourvu d'un crochet de sécurité fixé à l'anneau 12.The worker working at a high place wears a belt or a harness from which extends a link which is, at its free end, provided with a safety hook fixed to the ring 12.

Comme on le voit à la figure 3, la roue dentée 26 coopère avec la corde de sécurité 6 et constitue un frein empêchant le dispositif de glisser librement le long de ladite corde 6.As can be seen in FIG. 3, the toothed wheel 26 cooperates with the safety rope 6 and constitutes a brake preventing the device from sliding freely along said rope 6.

Au cours des différentes montées et descentes de l'ouvrier, le dispositif se déplace sans effort le long de la corde de sécurité 6, la roue 26 tournant en coopérant par ses dents avec ladite corde. Tant que la roue dentée 26 se déplace à une faible vitesse, les masselottes 27 et 28 sont entraînées dans le sens de rotation de la roue dentée 26.During the various ascents and descents of the worker, the device moves effortlessly along the safety rope 6, the wheel 26 rotating by cooperating with its teeth with said rope. As long as the gear 26 moves at a low speed, the weights 27 and 28 are driven in the direction of rotation of the gear 26.

Si on suppose (voir figure 9) que l'ouvrier tombe, le dispositif se déplace le long de la corde de sécurité dans le sens de la flèche f, la roue dentée 26 est entraînée à une grande vitesse de sorte que la masselotte 27, contre l'action du ressort 32, fera pivoter le cliquet 31 qui viendra alors s'engager dans une dent de la couronne 55 de sorte que les cames 41 et 42 sont entraînées dans le sens de la flèche g contre l'action de la branche 71 du ressort 70 puisque le doigt 51 bute contre l'extrémité correspondante de la fente 46, les dents 42c viennent alors s'encastrer dans la corde de sécurité 6 bloquant ainsi l'ensemble (voir figure 10).If it is assumed (see FIG. 9) that the worker falls, the device moves along the safety rope in the direction of arrow f, the toothed wheel 26 is driven at a high speed so that the counterweight 27, against the action of the spring 32, will rotate the pawl 31 which will then engage in a tooth of the crown 55 so that the cams 41 and 42 are driven in the direction of the arrow g against the action of the branch 71 of the spring 70 since the finger 51 abuts against the corresponding end of the slot 46, the teeth 42 c then come to be embedded in the safety rope 6 thus blocking the assembly (see FIG. 10).

Comme on le voit parfaitement à la figure 9, les dents 42c vont en s'éloignant de la bague 25 depuis la partie lisse 42a vers la fente 46 de sorte que le blocage sur la corde de sécurité 6 est d'autant plus efficace que la traction vers le bas est importante.As can be seen perfectly in FIG. 9, the teeth 42 c move away from the ring 25 from the smooth part 42 a towards the slot 46 so that the blocking on the safety rope 6 is all the more effective that pulling down is important.

Pour dégager le dispositif, il suffit de le faire coulisser dans le sens opposé à la flèche f, le ressort 70 ramenant les cames 41 et 42 dans la position initiale.To release the device, it is sufficient to slide it in the direction opposite to the arrow f, the spring 70 bringing the cams 41 and 42 back to the initial position.

On conçoit que le blocage sur la corde de sécurité est relativement progressif.It is understood that the blocking on the safety rope is relatively progressive.

Si le dispositif est monté dans le sens inverse le processus est identique mais dans ce cas c'est le cliquet 35 qui, en coopérant avec la couronne 56, commande le blocage, le téton 11 coulissant pour venir à l'autre extrémité du secteur 10 afin que l'anneau 12 soit dirigé vers le bas.If the device is mounted in the opposite direction the process is identical but in this case it is the pawl 35 which, by cooperating with the crown 56, controls the locking, the stud 11 sliding to come to the other end of the sector 10 so that the ring 12 is directed downwards.

Le dispositif est très facile à mettre en place sur la corde de sécurité 6 puisqu'il suffit de retirer la tige filetée 13 pour pouvoir écarter l'une de l'autre les joues 2 et 3 en les faisant basculer sur la charnière 4.The device is very easy to install on the safety rope 6 since it suffices to remove the threaded rod 13 in order to be able to move the cheeks 2 and 3 apart from one another by tilting them on the hinge 4.

Le dispositif fonctionnant dans les deux sens, il peut être monté sur la corde de sécurité 6 sans aucune précaution particulière.Since the device works in both directions, it can be mounted on the safety rope 6 without any special precautions.

Bien entendu, l'invention n'est pas limitée au mode de réalisation qui vient d'être décrit et représenté. On pourra y apporter de nombreuses modifications de détail sans sortir pour autant du cadre de l'invention.Of course, the invention is not limited to the embodiment which has just been described and shown. Many modifications of detail can be made without departing from the scope of the invention.

Claims (6)

Perfectionnements aux dispositifs de sécurité du type comprenant un corps (1) comportant deux joues (2 et 3) délimitant un canal (5) destiné à être traversé par une corde de sécurité (6) s'étendant verticalement le long d'un édifice, un anneau (12) destiné à être relié par un lien à une ceinture ou un harnais porté par un ouvrier, un frein (26) coopérant avec la corde de sécurité (6) afin d'éviter que le dispositif tende à glisser le long de ladite corde (6) et des moyens pour bloquer le dispositif sur la corde si l'ouvrier vient à chuter, caractérisés en ce que les joues (2 et 3) sont reliées par un axe transversal (18) sur lequel est montée à friction une roue dentée (26) coopérant avec la corde de sécurité (6) pour constituer le frein, sur l'axe (18) étant montée une câme (41, 42) présentant une denture (41c, 42c) susceptible de coopérer avec la corde de sécurité (6) et sollicitée dans une position écartée de ladite corde (6) par un ressort, sur l'axe (18) étant montée une masselotte (27, 28) coopérant avec un cliquet (31, 35) maintenue écartée d'une couronne dentée (55, 56) solidaire de la came (41, 42) par un ressort, la masselotte (27, 28) étant montée de manière que si la roue dentée tourne à une vitesse supérieure à un seuil déterminé elle commande l'engagement du cliquet dans la couronne dentée (55, 56) afin que la came soit entraînée et vienne par sa denture coincer la corde de sécurité dans le fond du canal.Improvements to safety devices of the type comprising a body (1) comprising two cheeks (2 and 3) delimiting a channel (5) intended to be crossed by a safety rope (6) extending vertically along a building, a ring (12) intended to be connected by a link to a belt or a harness worn by a worker, a brake (26) cooperating with the safety rope (6) in order to prevent the device from tending to slide along said rope (6) and means for locking the device on the rope if the worker falls, characterized in that the cheeks (2 and 3) are connected by a transverse axis (18) on which is frictionally mounted a toothed wheel (26) cooperating with the safety rope (6) to constitute the brake, on the axis (18) being mounted a cam (41, 42) having a toothing (41 c , 42 c ) capable of cooperating with the safety rope (6) and biased in a position away from said rope (6) by a spring ort, on the axis (18) being mounted a counterweight (27, 28) cooperating with a pawl (31, 35) kept apart from a toothed crown (55, 56) integral with the cam (41, 42) by a spring, the counterweight (27, 28) being mounted so that if the toothed wheel rotates at a speed greater than a determined threshold it controls the engagement of the pawl in the toothed crown (55, 56) so that the cam is driven and come by its teeth wedging the safety rope in the bottom of the channel. Perfectionnements aux dispositifs de sécuriré, selon la revendication 1 caractérisés en ce qu'ils comportent deux cames (41, 42) pourvues chacune d'une couronne dentée (55, 56), deux masselottes (27 et 28) disposées de part et d'autre de la roue dentée (26) et deux cliquets (31, 35) destinés à coopérer avec une couronne dentée correspondante, celles-ci ayant des dentures orientées en sens opposés, les cliquets (31, 35) étant également orientés en sens opposés et l'anneau (12) étant mobile dans une fente (10) des joues de manière à pouvoir être déposé sélectivement au voisinage de l'une ou l'autre extrémité du dispositif.Improvements to the safety devices, according to claim 1 characterized in that they comprise two cams (41, 42) each provided with a toothed crown (55, 56), two weights (27 and 28) arranged on either side other of the toothed wheel (26) and two pawls (31, 35) intended to cooperate with a corresponding toothed crown, these having teeth oriented in opposite directions, the pawls (31, 35) also being oriented in opposite directions and the ring (12) being movable in a slot (10) of the cheeks so as to be able to be deposited selectively in the vicinity of one or the other end of the device. Perfectionnements aux dispositifs de sécurité, selon la revendication 1, caractérisés en ce que la came (41, 42) comporte une fente (45, 46) en forme de secteur ayant pour centre l'axe (18) du dispositif et dans laquelle sont mobiles des doigts (51, 52) avec lesquels coopèrent les extrémités d'un ressort de torsion (70) enroulé sur l'axe et tendant à maintenir les doigts contre les extrémités correspondantes de la fente (45, 46).Improvements to safety devices, according to claim 1, characterized in that the cam (41, 42) has a sector-shaped slot (45, 46) having for center the axis (18) of the device and in which are movable fingers (51, 52) with which cooperate the ends of a torsion spring (70) wound on the axis and tending to hold the fingers against the corresponding ends of the slot (45, 46). Perfectionnements aux dispositifs de sécurité, selon les revendications 1 et 2, caractérisés en ce que la roue dentée (26) est solidaire d'un axe (33) faisant saillie sur ses deux faces et sur lequel sont montés articulés les cliquets (31, 35), les ressorts (32, 36) maintenant les cliquets écartés des couronnes dentées (55, 56) sont portés par des tétons solidaires de la roue dentée (26) et qui constituent des butées pour les masselottes (27, 28).Improvements to the safety devices according to claims 1 and 2, characterized in that the toothed wheel (26) is integral with an axis (33) projecting on its two faces and on which the pawls (31, 35 are articulated) ), the springs (32, 36) holding the pawls apart from the toothed crowns (55, 56) are carried by studs integral with the toothed wheel (26) and which constitute stops for the counterweights (27, 28). Perfectionnements aux dispositifs de sécurité, selon les revendications 1 et 2, caractérisés en ce que la roue dentée (26) est calée sur une bague (25) montée tournante sur l'axe et sur laquelle sont montées les masselottes (27, 28).Improvements to the safety devices according to claims 1 and 2, characterized in that the toothed wheel (26) is wedged on a ring (25) rotatably mounted on the axis and on which the weights (27, 28) are mounted. Perfectionnements aux dispositifs de sécurité, selon la revendication 1, caractérisés en ce que les joues (2,3) sont solidaires d'une charnière (4) et l'axe (18) est solidaire de l'une des joues (2) et est creux et taraudé pour recevoir une tige filetée (13) d'assemblage des deux joues entre elles.Improvements to the safety devices according to claim 1, characterized in that the cheeks (2,3) are integral with a hinge (4) and the axis (18) is integral with one of the cheeks (2) and is hollow and tapped to receive a threaded rod (13) for joining the two cheeks together.
EP19930400650 1992-03-18 1993-03-15 Security apparatus for workers working at high places Withdrawn EP0561682A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR929203234A FR2688815B1 (en) 1992-03-18 1992-03-18 IMPROVEMENTS IN SAFETY DEVICES FOR WORKERS WORKING IN HIGH AREAS.
FR9203234 1992-03-18

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US (1) US5323873A (en)
EP (1) EP0561682A1 (en)
JP (1) JPH067470A (en)
CA (1) CA2091554A1 (en)
FR (1) FR2688815B1 (en)

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WO1998002210A1 (en) * 1996-07-16 1998-01-22 Tractel S.A. Device for automatically stopping the fall of personnel working high above ground
EP0861678A3 (en) * 1997-02-07 1999-09-08 Cleveland E. Dodge Improved removable double action rope grip
US20160059055A1 (en) * 2014-08-04 2016-03-03 Markus Roth Deformable energy absorber with deformation indicator
CN107369177A (en) * 2017-07-03 2017-11-21 东南大学 A kind of roadside assistance equipment capstan winch rope based on figure identification is anti-to cross drawing method for early warning
GB2566574A (en) * 2017-07-28 2019-03-20 The Heightec Group Ltd Fall arrest device

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FR2842113B1 (en) * 2002-07-12 2004-09-24 Zedel FOLLOWING FALL ARRANGEMENT FOR FIXED ROPE
FR2860982B1 (en) * 2003-10-20 2006-01-20 Zedel ANTI-FALLING DEVICE WITH BLOCKING ROLL
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US20190338593A1 (en) * 2017-07-17 2019-11-07 Safeworks, Llc Integrated climb assist and fall arrest systems and methods
CN109806518B (en) 2019-03-08 2023-11-03 江南大学 Rail type safety falling protector
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WO1998002210A1 (en) * 1996-07-16 1998-01-22 Tractel S.A. Device for automatically stopping the fall of personnel working high above ground
FR2751233A1 (en) * 1996-07-16 1998-01-23 Tractel Sa AUTOMATIC FALL STOP DEVICE FOR PERSONNEL WORKING AT HEIGHT
CN1100576C (en) * 1996-07-16 2003-02-05 特里克特尔公司 Device for automatically stopping fall of personneel working high above ground
EP0861678A3 (en) * 1997-02-07 1999-09-08 Cleveland E. Dodge Improved removable double action rope grip
US20160059055A1 (en) * 2014-08-04 2016-03-03 Markus Roth Deformable energy absorber with deformation indicator
US10449400B2 (en) * 2014-08-04 2019-10-22 Honeywell International Inc. Deformable energy absorber with deformation indicator
US11612772B2 (en) 2014-08-04 2023-03-28 Honeywell International Inc. Deformable energy absorber with deformation indicator
CN107369177A (en) * 2017-07-03 2017-11-21 东南大学 A kind of roadside assistance equipment capstan winch rope based on figure identification is anti-to cross drawing method for early warning
CN107369177B (en) * 2017-07-03 2019-10-11 东南大学 A kind of roadside assistance equipment capstan winch rope based on figure identification is anti-to cross drawing method for early warning
GB2566574A (en) * 2017-07-28 2019-03-20 The Heightec Group Ltd Fall arrest device
GB2566574B (en) * 2017-07-28 2023-03-01 The Heightec Group Ltd Fall arrest device

Also Published As

Publication number Publication date
CA2091554A1 (en) 1993-09-19
FR2688815A1 (en) 1993-09-24
FR2688815B1 (en) 1994-06-10
JPH067470A (en) 1994-01-18
US5323873A (en) 1994-06-28

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